Giancarlos is a distinctive boys' name in United States, ranking #4733 in 1998 with 14 recorded births. The name reached its all-time peak in 2010 with 48 births ranking #2564. Since 1996, the popularity has increased by 100.0%. In 1998, approximately 1 in every 136,523 boys born was named Giancarlos. FALLING Recent data shows the name is currently falling.